A wave of destruction? (7)

I believe the answer is:

breaker

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'a wave' is the definition.
(I know that breaker is a type of wave)

I don't understand the rest of the clue.

(Other definitions for breaker that I've seen before include "Heavy wave arriving on the shore" , "White-topped wave" , "Wave hitting the shore" , "Large sea wave" , "from rider disciplining horse?" .)

I've seen this clue in the Evening Standard.

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